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From Darren Reed: just show protocol 0x00fb as "compressed PPP data".
[tcpdump] / print-ppp.c
1 /*
2 * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 *
21 * Extensively modified by Motonori Shindo (mshindo@mshindo.net) for more
22 * complete PPP support.
23 */
24
25 /*
26 * TODO:
27 * o resolve XXX as much as possible
28 * o MP support
29 * o BAP support
30 */
31
32 #ifndef lint
33 static const char rcsid[] _U_ =
34 "@(#) $Header: /tcpdump/master/tcpdump/print-ppp.c,v 1.98 2004-07-06 22:11:17 guy Exp $ (LBL)";
35 #endif
36
37 #ifdef HAVE_CONFIG_H
38 #include "config.h"
39 #endif
40
41 #include <tcpdump-stdinc.h>
42
43 #ifdef __bsdi__
44 #include <net/slcompress.h>
45 #include <net/if_ppp.h>
46 #endif
47
48 #include <pcap.h>
49 #include <stdio.h>
50 #include <stdlib.h>
51
52 #include "interface.h"
53 #include "extract.h"
54 #include "addrtoname.h"
55 #include "ppp.h"
56 #include "chdlc.h"
57 #include "ethertype.h"
58 #include "oui.h"
59
60 /*
61 * The following constatns are defined by IANA. Please refer to
62 * http://www.isi.edu/in-notes/iana/assignments/ppp-numbers
63 * for the up-to-date information.
64 */
65
66 /* Protocol Codes defined in ppp.h */
67
68 struct tok ppptype2str[] = {
69 { PPP_IP, "IP" },
70 { PPP_OSI, "OSI" },
71 { PPP_NS, "NS" },
72 { PPP_DECNET, "DECNET" },
73 { PPP_APPLE, "APPLE" },
74 { PPP_IPX, "IPX" },
75 { PPP_VJC, "VJC IP" },
76 { PPP_VJNC, "VJNC IP" },
77 { PPP_BRPDU, "BRPDU" },
78 { PPP_STII, "STII" },
79 { PPP_VINES, "VINES" },
80 { PPP_MPLS_UCAST, "MPLS" },
81 { PPP_MPLS_MCAST, "MPLS" },
82 { PPP_COMP, "Compressed"},
83
84 { PPP_HELLO, "HELLO" },
85 { PPP_LUXCOM, "LUXCOM" },
86 { PPP_SNS, "SNS" },
87 { PPP_IPCP, "IPCP" },
88 { PPP_OSICP, "OSICP" },
89 { PPP_NSCP, "NSCP" },
90 { PPP_DECNETCP, "DECNETCP" },
91 { PPP_APPLECP, "APPLECP" },
92 { PPP_IPXCP, "IPXCP" },
93 { PPP_STIICP, "STIICP" },
94 { PPP_VINESCP, "VINESCP" },
95 { PPP_MPLSCP, "MPLSCP" },
96
97 { PPP_LCP, "LCP" },
98 { PPP_PAP, "PAP" },
99 { PPP_LQM, "LQM" },
100 { PPP_CHAP, "CHAP" },
101 { PPP_BACP, "BACP" },
102 { PPP_BAP, "BAP" },
103 { PPP_MP, "ML" },
104 { 0, NULL }
105 };
106
107 /* Control Protocols (LCP/IPCP/CCP etc.) Codes defined in RFC 1661 */
108
109 #define CPCODES_VEXT 0 /* Vendor-Specific (RFC2153) */
110 #define CPCODES_CONF_REQ 1 /* Configure-Request */
111 #define CPCODES_CONF_ACK 2 /* Configure-Ack */
112 #define CPCODES_CONF_NAK 3 /* Configure-Nak */
113 #define CPCODES_CONF_REJ 4 /* Configure-Reject */
114 #define CPCODES_TERM_REQ 5 /* Terminate-Request */
115 #define CPCODES_TERM_ACK 6 /* Terminate-Ack */
116 #define CPCODES_CODE_REJ 7 /* Code-Reject */
117 #define CPCODES_PROT_REJ 8 /* Protocol-Reject (LCP only) */
118 #define CPCODES_ECHO_REQ 9 /* Echo-Request (LCP only) */
119 #define CPCODES_ECHO_RPL 10 /* Echo-Reply (LCP only) */
120 #define CPCODES_DISC_REQ 11 /* Discard-Request (LCP only) */
121 #define CPCODES_ID 12 /* Identification (LCP only) RFC1570 */
122 #define CPCODES_TIME_REM 13 /* Time-Remaining (LCP only) RFC1570 */
123 #define CPCODES_RESET_REQ 14 /* Reset-Request (CCP only) RFC1962 */
124 #define CPCODES_RESET_REP 15 /* Reset-Reply (CCP only) */
125
126 struct tok cpcodes[] = {
127 {CPCODES_VEXT, "Vendor-Extension"}, /* RFC2153 */
128 {CPCODES_CONF_REQ, "Conf-Request"},
129 {CPCODES_CONF_ACK, "Conf-Ack"},
130 {CPCODES_CONF_NAK, "Conf-Nack"},
131 {CPCODES_CONF_REJ, "Conf-Reject"},
132 {CPCODES_TERM_REQ, "Term-Request"},
133 {CPCODES_TERM_ACK, "Term-Ack"},
134 {CPCODES_CODE_REJ, "Code-Reject"},
135 {CPCODES_PROT_REJ, "Prot-Reject"},
136 {CPCODES_ECHO_REQ, "Echo-Request"},
137 {CPCODES_ECHO_RPL, "Echo-Reply"},
138 {CPCODES_DISC_REQ, "Disc-Req"},
139 {CPCODES_ID, "Ident"}, /* RFC1570 */
140 {CPCODES_TIME_REM, "Time-Rem"}, /* RFC1570 */
141 {CPCODES_RESET_REQ, "Reset-Req"}, /* RFC1962 */
142 {CPCODES_RESET_REP, "Reset-Ack"}, /* RFC1962 */
143 {0, NULL}
144 };
145
146 /* LCP Config Options */
147
148 #define LCPOPT_VEXT 0
149 #define LCPOPT_MRU 1
150 #define LCPOPT_ACCM 2
151 #define LCPOPT_AP 3
152 #define LCPOPT_QP 4
153 #define LCPOPT_MN 5
154 #define LCPOPT_DEP6 6
155 #define LCPOPT_PFC 7
156 #define LCPOPT_ACFC 8
157 #define LCPOPT_FCSALT 9
158 #define LCPOPT_SDP 10
159 #define LCPOPT_NUMMODE 11
160 #define LCPOPT_DEP12 12
161 #define LCPOPT_CBACK 13
162 #define LCPOPT_DEP14 14
163 #define LCPOPT_DEP15 15
164 #define LCPOPT_DEP16 16
165 #define LCPOPT_MLMRRU 17
166 #define LCPOPT_MLSSNHF 18
167 #define LCPOPT_MLED 19
168 #define LCPOPT_PROP 20
169 #define LCPOPT_DCEID 21
170 #define LCPOPT_MPP 22
171 #define LCPOPT_LD 23
172 #define LCPOPT_LCPAOPT 24
173 #define LCPOPT_COBS 25
174 #define LCPOPT_PE 26
175 #define LCPOPT_MLHF 27
176 #define LCPOPT_I18N 28
177 #define LCPOPT_SDLOS 29
178 #define LCPOPT_PPPMUX 30
179
180 #define LCPOPT_MIN LCPOPT_VEXT
181 #define LCPOPT_MAX LCPOPT_PPPMUX
182
183 static const char *lcpconfopts[] = {
184 "Vend-Ext", /* (0) */
185 "MRU", /* (1) */
186 "ACCM", /* (2) */
187 "Auth-Prot", /* (3) */
188 "Qual-Prot", /* (4) */
189 "Magic-Num", /* (5) */
190 "deprecated(6)", /* used to be a Quality Protocol */
191 "PFC", /* (7) */
192 "ACFC", /* (8) */
193 "FCS-Alt", /* (9) */
194 "SDP", /* (10) */
195 "Num-Mode", /* (11) */
196 "deprecated(12)", /* used to be a Multi-Link-Procedure*/
197 "Call-Back", /* (13) */
198 "deprecated(14)", /* used to be a Connect-Time */
199 "deprecated(15)", /* used to be a Compund-Frames */
200 "deprecated(16)", /* used to be a Nominal-Data-Encap */
201 "MRRU", /* (17) */
202 "SSNHF", /* (18) */
203 "End-Disc", /* (19) */
204 "Proprietary", /* (20) */
205 "DCE-Id", /* (21) */
206 "MP+", /* (22) */
207 "Link-Disc", /* (23) */
208 "LCP-Auth-Opt", /* (24) */
209 "COBS", /* (25) */
210 "Prefix-elision", /* (26) */
211 "Multilink-header-Form",/* (27) */
212 "I18N", /* (28) */
213 "SDL-over-SONET/SDH", /* (29) */
214 "PPP-Muxing", /* (30) */
215 };
216
217 /* IPV6CP - to be supported */
218 /* ECP - to be supported */
219
220 /* CCP Config Options */
221
222 #define CCPOPT_OUI 0 /* RFC1962 */
223 #define CCPOPT_PRED1 1 /* RFC1962 */
224 #define CCPOPT_PRED2 2 /* RFC1962 */
225 #define CCPOPT_PJUMP 3 /* RFC1962 */
226 /* 4-15 unassigned */
227 #define CCPOPT_HPPPC 16 /* RFC1962 */
228 #define CCPOPT_STACLZS 17 /* RFC1974 */
229 #define CCPOPT_MPPC 18 /* RFC2118 */
230 #define CCPOPT_GFZA 19 /* RFC1962 */
231 #define CCPOPT_V42BIS 20 /* RFC1962 */
232 #define CCPOPT_BSDCOMP 21 /* RFC1977 */
233 /* 22 unassigned */
234 #define CCPOPT_LZSDCP 23 /* RFC1967 */
235 #define CCPOPT_MVRCA 24 /* RFC1975 */
236 #define CCPOPT_DEC 25 /* RFC1976 */
237 #define CCPOPT_DEFLATE 26 /* RFC1979 */
238 /* 27-254 unassigned */
239 #define CCPOPT_RESV 255 /* RFC1962 */
240
241 #define CCPOPT_MIN CCPOPT_OUI
242 #define CCPOPT_MAX CCPOPT_DEFLATE /* XXX: should be CCPOPT_RESV but... */
243
244 static const char *ccpconfopts[] = {
245 "OUI", /* (0) */
246 "Pred-1", /* (1) */
247 "Pred-2", /* (2) */
248 "Puddle", /* (3) */
249 "unassigned(4)", /* (4) */
250 "unassigned(5)", /* (5) */
251 "unassigned(6)", /* (6) */
252 "unassigned(7)", /* (7) */
253 "unassigned(8)", /* (8) */
254 "unassigned(9)", /* (9) */
255 "unassigned(10)", /* (10) */
256 "unassigned(11)", /* (11) */
257 "unassigned(12)", /* (12) */
258 "unassigned(13)", /* (13) */
259 "unassigned(14)", /* (14) */
260 "unassigned(15)", /* (15) */
261 "HP-PPC", /* (16) */
262 "Stac-LZS", /* (17) */
263 "MPPC", /* (18) */
264 "Gand-FZA", /* (19) */
265 "V.42bis", /* (20) */
266 "BSD-Comp", /* (21) */
267 "unassigned(22)", /* (22) */
268 "LZS-DCP", /* (23) */
269 "MVRCA", /* (24) */
270 "DEC", /* (25) */
271 "Deflate", /* (26) */
272 };
273
274 /* BACP Config Options */
275
276 #define BACPOPT_FPEER 1 /* RFC2125 */
277
278 /* SDCP - to be supported */
279
280 /* IPCP Config Options */
281
282 #define IPCPOPT_2ADDR 1 /* RFC1172, RFC1332 (deprecated) */
283 #define IPCPOPT_IPCOMP 2 /* RFC1332 */
284 #define IPCPOPT_ADDR 3 /* RFC1332 */
285 #define IPCPOPT_MOBILE4 4 /* RFC2290 */
286
287 #define IPCPOPT_PRIDNS 129 /* RFC1877 */
288 #define IPCPOPT_PRINBNS 130 /* RFC1877 */
289 #define IPCPOPT_SECDNS 131 /* RFC1877 */
290 #define IPCPOPT_SECNBNS 132 /* RFC1877 */
291
292 /* ATCP - to be supported */
293 /* OSINLCP - to be supported */
294 /* BVCP - to be supported */
295 /* BCP - to be supported */
296 /* IPXCP - to be supported */
297 /* MPLSCP - to be supported */
298
299 /* Auth Algorithms */
300
301 /* 0-4 Reserved (RFC1994) */
302 #define AUTHALG_CHAPMD5 5 /* RFC1994 */
303 #define AUTHALG_MSCHAP1 128 /* RFC2433 */
304 #define AUTHALG_MSCHAP2 129 /* RFC2795 */
305
306 /* FCS Alternatives - to be supported */
307
308 /* Multilink Endpoint Discriminator (RFC1717) */
309 #define MEDCLASS_NULL 0 /* Null Class */
310 #define MEDCLASS_LOCAL 1 /* Locally Assigned */
311 #define MEDCLASS_IPV4 2 /* Internet Protocol (IPv4) */
312 #define MEDCLASS_MAC 3 /* IEEE 802.1 global MAC address */
313 #define MEDCLASS_MNB 4 /* PPP Magic Number Block */
314 #define MEDCLASS_PSNDN 5 /* Public Switched Network Director Number */
315
316 /* PPP LCP Callback */
317 #define CALLBACK_AUTH 0 /* Location determined by user auth */
318 #define CALLBACK_DSTR 1 /* Dialing string */
319 #define CALLBACK_LID 2 /* Location identifier */
320 #define CALLBACK_E164 3 /* E.164 number */
321 #define CALLBACK_X500 4 /* X.500 distinguished name */
322 #define CALLBACK_CBCP 6 /* Location is determined during CBCP nego */
323
324 /* CHAP */
325
326 #define CHAP_CHAL 1
327 #define CHAP_RESP 2
328 #define CHAP_SUCC 3
329 #define CHAP_FAIL 4
330
331 #define CHAP_CODEMIN CHAP_CHAL
332 #define CHAP_CODEMAX CHAP_FAIL
333
334 static const char *chapcode[] = {
335 "Chal", /* (1) */
336 "Resp", /* (2) */
337 "Succ", /* (3) */
338 "Fail", /* (4) */
339 };
340
341 /* PAP */
342
343 #define PAP_AREQ 1
344 #define PAP_AACK 2
345 #define PAP_ANAK 3
346
347 #define PAP_CODEMIN PAP_AREQ
348 #define PAP_CODEMAX PAP_ANAK
349
350 static const char *papcode[] = {
351 "Auth-Req", /* (1) */
352 "Auth-Ack", /* (2) */
353 "Auth-Nak", /* (3) */
354 };
355
356 /* BAP */
357 #define BAP_CALLREQ 1
358 #define BAP_CALLRES 2
359 #define BAP_CBREQ 3
360 #define BAP_CBRES 4
361 #define BAP_LDQREQ 5
362 #define BAP_LDQRES 6
363 #define BAP_CSIND 7
364 #define BAP_CSRES 8
365
366 static void handle_ctrl_proto (u_int proto,const u_char *p, int length);
367 static void handle_chap (const u_char *p, int length);
368 static void handle_pap (const u_char *p, int length);
369 static void handle_bap (const u_char *p, int length);
370 static int print_lcp_config_options (const u_char *p, int);
371 static int print_ipcp_config_options (const u_char *p, int);
372 static int print_ccp_config_options (const u_char *p, int);
373 static int print_bacp_config_options (const u_char *p, int);
374 static void handle_ppp (u_int proto, const u_char *p, int length);
375 static void ppp_hdlc(const u_char *p, int length);
376
377 /* generic Control Protocol (e.g. LCP, IPCP, CCP, etc.) handler */
378 static void
379 handle_ctrl_proto(u_int proto, const u_char *pptr, int length)
380 {
381 const char *typestr;
382 u_int code, len;
383 int (*pfunc)(const u_char *, int);
384 int x, j;
385 const u_char *tptr;
386
387 tptr=pptr;
388
389 typestr = tok2str(ppptype2str, "unknown", proto);
390 printf("%s, ",typestr);
391
392 if (length < 4) /* FIXME weak boundary checking */
393 goto trunc;
394 TCHECK2(*tptr, 2);
395
396 code = *tptr++;
397
398 printf("%s (0x%02x), id %u",
399 tok2str(cpcodes, "Unknown Opcode",code),
400 code,
401 *tptr++); /* ID */
402
403 TCHECK2(*tptr, 2);
404 len = EXTRACT_16BITS(tptr);
405 tptr += 2;
406
407 if (length <= 4)
408 return; /* there may be a NULL confreq etc. */
409
410 switch (code) {
411 case CPCODES_VEXT:
412 if (length < 11)
413 break;
414 TCHECK2(*tptr, 4);
415 printf(", Magic-Num 0x%08x", EXTRACT_32BITS(tptr));
416 tptr += 4;
417 TCHECK2(*tptr, 3);
418 printf(" Vendor: %s (%u)",
419 tok2str(oui_values,"Unknown",EXTRACT_24BITS(tptr)),
420 EXTRACT_24BITS(tptr));
421 /* XXX: need to decode Kind and Value(s)? */
422 break;
423 case CPCODES_CONF_REQ:
424 case CPCODES_CONF_ACK:
425 case CPCODES_CONF_NAK:
426 case CPCODES_CONF_REJ:
427 x = len - 4; /* Code(1), Identifier(1) and Length(2) */
428 do {
429 switch (proto) {
430 case PPP_LCP:
431 pfunc = print_lcp_config_options;
432 break;
433 case PPP_IPCP:
434 pfunc = print_ipcp_config_options;
435 break;
436 case PPP_CCP:
437 pfunc = print_ccp_config_options;
438 break;
439 case PPP_BACP:
440 pfunc = print_bacp_config_options;
441 break;
442 default:
443 /*
444 * This should never happen, but we set
445 * "pfunc" to squelch uninitialized
446 * variable warnings from compilers.
447 */
448 pfunc = NULL;
449 break;
450 }
451 if ((j = (*pfunc)(tptr, len)) == 0)
452 break;
453 x -= j;
454 tptr += j;
455 } while (x > 0);
456 break;
457
458 case CPCODES_TERM_REQ:
459 case CPCODES_TERM_ACK:
460 /* XXX: need to decode Data? */
461 break;
462 case CPCODES_CODE_REJ:
463 /* XXX: need to decode Rejected-Packet? */
464 break;
465 case CPCODES_PROT_REJ:
466 if (length < 6)
467 break;
468 TCHECK2(*tptr, 2);
469 printf(", Rejected %s Protocol (0x%04x)",
470 tok2str(ppptype2str,"unknown", EXTRACT_16BITS(tptr)),
471 EXTRACT_16BITS(tptr));
472 /* XXX: need to decode Rejected-Information? */
473 break;
474 case CPCODES_ECHO_REQ:
475 case CPCODES_ECHO_RPL:
476 case CPCODES_DISC_REQ:
477 case CPCODES_ID:
478 if (length < 8)
479 break;
480 TCHECK2(*tptr, 4);
481 printf(", Magic-Num 0x%08x", EXTRACT_32BITS(tptr));
482 /* XXX: need to decode Data? */
483 break;
484 case CPCODES_TIME_REM:
485 if (length < 12)
486 break;
487 TCHECK2(*tptr, 4);
488 printf(", Magic-Num 0x%08x", EXTRACT_32BITS(tptr));
489 TCHECK2(*(tptr + 4), 4);
490 printf(", Seconds-Remaining %us", EXTRACT_32BITS(tptr + 4));
491 /* XXX: need to decode Message? */
492 break;
493 default:
494 /* XXX this is dirty but we do not get the
495 * original pointer passed to the begin
496 * the PPP packet */
497 if (vflag <= 1)
498 print_unknown_data(pptr-2,"\n\t",length+2);
499 break;
500 }
501 printf(", length %u", length);
502
503 if (vflag >1)
504 print_unknown_data(pptr-2,"\n\t",length+2);
505 return;
506
507 trunc:
508 printf("[|%s]", typestr);
509 }
510
511 /* LCP config options */
512 static int
513 print_lcp_config_options(const u_char *p, int length)
514 {
515 int len, opt;
516
517 if (length < 2)
518 return 0;
519 TCHECK2(*p, 2);
520 len = p[1];
521 opt = p[0];
522 if (length < len)
523 return 0;
524 if ((opt >= LCPOPT_MIN) && (opt <= LCPOPT_MAX))
525 printf(", %s (%u)", lcpconfopts[opt],opt);
526 else {
527 printf(", unknown LCP option 0x%02x", opt);
528 return len;
529 }
530
531 switch (opt) {
532 case LCPOPT_VEXT:
533 if (len >= 6) {
534 TCHECK2(*(p + 2), 3);
535 printf(" Vendor: %s (%u)",
536 tok2str(oui_values,"Unknown",EXTRACT_24BITS(p+2)),
537 EXTRACT_24BITS(p+2));
538 #if 0
539 TCHECK(p[5]);
540 printf(", kind: 0x%02x", p[5]);
541 printf(", Value: 0x")
542 for (i = 0; i < len - 6; i++) {
543 TCHECK(p[6 + i]);
544 printf("%02x", p[6 + i]);
545 }
546 #endif
547 }
548 break;
549 case LCPOPT_MRU:
550 if (len == 4) {
551 TCHECK2(*(p + 2), 2);
552 printf(" %u", EXTRACT_16BITS(p + 2));
553 }
554 break;
555 case LCPOPT_ACCM:
556 if (len == 6) {
557 TCHECK2(*(p + 2), 4);
558 printf(" 0x%08x", EXTRACT_32BITS(p + 2));
559 }
560 break;
561 case LCPOPT_AP:
562 if (len >= 4) {
563 TCHECK2(*(p + 2), 2);
564 switch (EXTRACT_16BITS(p+2)) {
565 case PPP_PAP:
566 printf(" PAP");
567 break;
568 case PPP_CHAP:
569 printf(" CHAP");
570 TCHECK(p[4]);
571 switch (p[4]) {
572 default:
573 printf(", unknown-algorithm-%u", p[4]);
574 break;
575 case AUTHALG_CHAPMD5:
576 printf(", MD5");
577 break;
578 case AUTHALG_MSCHAP1:
579 printf(", MSCHAPv1");
580 break;
581 case AUTHALG_MSCHAP2:
582 printf(", MSCHAPv2");
583 break;
584 }
585 break;
586 case PPP_EAP:
587 printf(" EAP");
588 break;
589 case PPP_SPAP:
590 printf(" SPAP");
591 break;
592 case PPP_SPAP_OLD:
593 printf(" Old-SPAP");
594 break;
595 default:
596 printf("unknown");
597 }
598 }
599 break;
600 case LCPOPT_QP:
601 if (len >= 4) {
602 TCHECK2(*(p + 2), 2);
603 if (EXTRACT_16BITS(p+2) == PPP_LQM)
604 printf(" LQR");
605 else
606 printf(" unknown");
607 }
608 break;
609 case LCPOPT_MN:
610 if (len == 6) {
611 TCHECK2(*(p + 2), 4);
612 printf(" 0x%08x", EXTRACT_32BITS(p + 2));
613 }
614 break;
615 case LCPOPT_PFC:
616 break;
617 case LCPOPT_ACFC:
618 break;
619 case LCPOPT_LD:
620 if (len == 4) {
621 TCHECK2(*(p + 2), 2);
622 printf(" 0x%04x", EXTRACT_16BITS(p + 2));
623 }
624 break;
625 case LCPOPT_CBACK:
626 if (len < 3)
627 break;
628 TCHECK(p[2]);
629 switch (p[2]) { /* Operation */
630 case CALLBACK_AUTH:
631 printf(" UserAuth");
632 break;
633 case CALLBACK_DSTR:
634 printf(" DialString");
635 break;
636 case CALLBACK_LID:
637 printf(" LocalID");
638 break;
639 case CALLBACK_E164:
640 printf(" E.164");
641 break;
642 case CALLBACK_X500:
643 printf(" X.500");
644 break;
645 case CALLBACK_CBCP:
646 printf(" CBCP");
647 break;
648 default:
649 printf(" unknown-operation=%u", p[2]);
650 break;
651 }
652 break;
653 case LCPOPT_MLMRRU:
654 if (len == 4) {
655 TCHECK2(*(p + 2), 2);
656 printf(" %u", EXTRACT_16BITS(p + 2));
657 }
658 break;
659 case LCPOPT_MLED:
660 if (len < 3)
661 break;
662 TCHECK(p[2]);
663 switch (p[2]) { /* class */
664 case MEDCLASS_NULL:
665 printf(" Null");
666 break;
667 case MEDCLASS_LOCAL:
668 printf(" Local"); /* XXX */
669 break;
670 case MEDCLASS_IPV4:
671 if (len != 7)
672 break;
673 TCHECK2(*(p + 3), 4);
674 printf(" IPv4 %s", ipaddr_string(p + 3));
675 break;
676 case MEDCLASS_MAC:
677 if (len != 9)
678 break;
679 TCHECK(p[8]);
680 printf(" MAC %02x:%02x:%02x:%02x:%02x:%02x",
681 p[3], p[4], p[5], p[6], p[7], p[8]);
682 break;
683 case MEDCLASS_MNB:
684 printf(" Magic-Num-Block"); /* XXX */
685 break;
686 case MEDCLASS_PSNDN:
687 printf(" PSNDN"); /* XXX */
688 break;
689 }
690 break;
691
692 /* XXX: to be supported */
693 #if 0
694 case LCPOPT_DEP6:
695 case LCPOPT_FCSALT:
696 case LCPOPT_SDP:
697 case LCPOPT_NUMMODE:
698 case LCPOPT_DEP12:
699 case LCPOPT_DEP14:
700 case LCPOPT_DEP15:
701 case LCPOPT_DEP16:
702 case LCPOPT_MLSSNHF:
703 case LCPOPT_PROP:
704 case LCPOPT_DCEID:
705 case LCPOPT_MPP:
706 case LCPOPT_LCPAOPT:
707 case LCPOPT_COBS:
708 case LCPOPT_PE:
709 case LCPOPT_MLHF:
710 case LCPOPT_I18N:
711 case LCPOPT_SDLOS:
712 case LCPOPT_PPPMUX:
713 break;
714 #endif
715 }
716 return len;
717
718 trunc:
719 printf("[|lcp]");
720 return 0;
721 }
722
723 /* CHAP */
724 static void
725 handle_chap(const u_char *p, int length)
726 {
727 u_int code, len;
728 int val_size, name_size, msg_size;
729 const u_char *p0;
730 int i;
731
732 p0 = p;
733 if (length < 1) {
734 printf("[|chap]");
735 return;
736 } else if (length < 4) {
737 TCHECK(*p);
738 printf("[|chap 0x%02x]", *p);
739 return;
740 }
741
742 TCHECK(*p);
743 code = *p;
744 if ((code >= CHAP_CODEMIN) && (code <= CHAP_CODEMAX))
745 printf("%s", chapcode[code - 1]);
746 else {
747 printf("0x%02x", code);
748 return;
749 }
750 p++;
751
752 TCHECK(*p);
753 printf("(%u)", *p); /* ID */
754 p++;
755
756 TCHECK2(*p, 2);
757 len = EXTRACT_16BITS(p);
758 p += 2;
759
760 /*
761 * Note that this is a generic CHAP decoding routine. Since we
762 * don't know which flavor of CHAP (i.e. CHAP-MD5, MS-CHAPv1,
763 * MS-CHAPv2) is used at this point, we can't decode packet
764 * specifically to each algorithms. Instead, we simply decode
765 * the GCD (Gratest Common Denominator) for all algorithms.
766 */
767 switch (code) {
768 case CHAP_CHAL:
769 case CHAP_RESP:
770 if (length - (p - p0) < 1)
771 return;
772 TCHECK(*p);
773 val_size = *p; /* value size */
774 p++;
775 if (length - (p - p0) < val_size)
776 return;
777 printf(", Value ");
778 for (i = 0; i < val_size; i++) {
779 TCHECK(*p);
780 printf("%02x", *p++);
781 }
782 name_size = len - (p - p0);
783 printf(", Name ");
784 for (i = 0; i < name_size; i++) {
785 TCHECK(*p);
786 safeputchar(*p++);
787 }
788 break;
789 case CHAP_SUCC:
790 case CHAP_FAIL:
791 msg_size = len - (p - p0);
792 printf(", Msg ");
793 for (i = 0; i< msg_size; i++) {
794 TCHECK(*p);
795 safeputchar(*p++);
796 }
797 break;
798 }
799 return;
800
801 trunc:
802 printf("[|chap]");
803 }
804
805 /* PAP (see RFC 1334) */
806 static void
807 handle_pap(const u_char *p, int length)
808 {
809 u_int code, len;
810 int peerid_len, passwd_len, msg_len;
811 const u_char *p0;
812 int i;
813
814 p0 = p;
815 if (length < 1) {
816 printf("[|pap]");
817 return;
818 } else if (length < 4) {
819 TCHECK(*p);
820 printf("[|pap 0x%02x]", *p);
821 return;
822 }
823
824 TCHECK(*p);
825 code = *p;
826 if ((code >= PAP_CODEMIN) && (code <= PAP_CODEMAX))
827 printf("%s", papcode[code - 1]);
828 else {
829 printf("0x%02x", code);
830 return;
831 }
832 p++;
833
834 TCHECK(*p);
835 printf("(%u)", *p); /* ID */
836 p++;
837
838 TCHECK2(*p, 2);
839 len = EXTRACT_16BITS(p);
840 p += 2;
841
842 switch (code) {
843 case PAP_AREQ:
844 if (length - (p - p0) < 1)
845 return;
846 TCHECK(*p);
847 peerid_len = *p; /* Peer-ID Length */
848 p++;
849 if (length - (p - p0) < peerid_len)
850 return;
851 printf(", Peer ");
852 for (i = 0; i < peerid_len; i++) {
853 TCHECK(*p);
854 safeputchar(*p++);
855 }
856
857 if (length - (p - p0) < 1)
858 return;
859 TCHECK(*p);
860 passwd_len = *p; /* Password Length */
861 p++;
862 if (length - (p - p0) < passwd_len)
863 return;
864 printf(", Name ");
865 for (i = 0; i < passwd_len; i++) {
866 TCHECK(*p);
867 safeputchar(*p++);
868 }
869 break;
870 case PAP_AACK:
871 case PAP_ANAK:
872 if (length - (p - p0) < 1)
873 return;
874 TCHECK(*p);
875 msg_len = *p; /* Msg-Length */
876 p++;
877 if (length - (p - p0) < msg_len)
878 return;
879 printf(", Msg ");
880 for (i = 0; i< msg_len; i++) {
881 TCHECK(*p);
882 safeputchar(*p++);
883 }
884 break;
885 }
886 return;
887
888 trunc:
889 printf("[|pap]");
890 }
891
892 /* BAP */
893 static void
894 handle_bap(const u_char *p _U_, int length _U_)
895 {
896 /* XXX: to be supported!! */
897 }
898
899
900 /* IPCP config options */
901 static int
902 print_ipcp_config_options(const u_char *p, int length)
903 {
904 int len, opt;
905
906 if (length < 2)
907 return 0;
908 TCHECK2(*p, 2);
909 len = p[1];
910 opt = p[0];
911 if (length < len)
912 return 0;
913 switch (opt) {
914 case IPCPOPT_2ADDR: /* deprecated */
915 if (len != 10)
916 goto invlen;
917 TCHECK2(*(p + 6), 4);
918 printf(", IP-Addrs src %s, dst %s",
919 ipaddr_string(p + 2),
920 ipaddr_string(p + 6));
921 break;
922 case IPCPOPT_IPCOMP:
923 if (len < 4)
924 goto invlen;
925 printf(", IP-Comp");
926 TCHECK2(*(p + 2), 2);
927 if (EXTRACT_16BITS(p + 2) == PPP_VJC) {
928 printf(" VJ-Comp");
929 /* XXX: VJ-Comp parameters should be decoded */
930 } else
931 printf(" unknown-comp-proto=%04x", EXTRACT_16BITS(p + 2));
932 break;
933 case IPCPOPT_ADDR:
934 if (len != 6)
935 goto invlen;
936 TCHECK2(*(p + 2), 4);
937 printf(", IP-Addr %s", ipaddr_string(p + 2));
938 break;
939 case IPCPOPT_MOBILE4:
940 if (len != 6)
941 goto invlen;
942 TCHECK2(*(p + 2), 4);
943 printf(", Home-Addr %s", ipaddr_string(p + 2));
944 break;
945 case IPCPOPT_PRIDNS:
946 if (len != 6)
947 goto invlen;
948 TCHECK2(*(p + 2), 4);
949 printf(", Pri-DNS %s", ipaddr_string(p + 2));
950 break;
951 case IPCPOPT_PRINBNS:
952 if (len != 6)
953 goto invlen;
954 TCHECK2(*(p + 2), 4);
955 printf(", Pri-NBNS %s", ipaddr_string(p + 2));
956 break;
957 case IPCPOPT_SECDNS:
958 if (len != 6)
959 goto invlen;
960 TCHECK2(*(p + 2), 4);
961 printf(", Sec-DNS %s", ipaddr_string(p + 2));
962 break;
963 case IPCPOPT_SECNBNS:
964 if (len != 6)
965 goto invlen;
966 TCHECK2(*(p + 2), 4);
967 printf(", Sec-NBNS %s", ipaddr_string(p + 2));
968 break;
969 default:
970 printf(", unknown-%d", opt);
971 break;
972 }
973 return len;
974
975 invlen:
976 printf(", invalid-length-%d", opt);
977 return 0;
978
979 trunc:
980 printf("[|ipcp]");
981 return 0;
982 }
983
984 /* CCP config options */
985 static int
986 print_ccp_config_options(const u_char *p, int length)
987 {
988 int len, opt;
989
990 if (length < 2)
991 return 0;
992 TCHECK2(*p, 2);
993 len = p[1];
994 opt = p[0];
995 if (length < len)
996 return 0;
997 if ((opt >= CCPOPT_MIN) && (opt <= CCPOPT_MAX))
998 printf(", %s", ccpconfopts[opt]);
999 #if 0 /* XXX */
1000 switch (opt) {
1001 case CCPOPT_OUI:
1002 case CCPOPT_PRED1:
1003 case CCPOPT_PRED2:
1004 case CCPOPT_PJUMP:
1005 case CCPOPT_HPPPC:
1006 case CCPOPT_STACLZS:
1007 case CCPOPT_MPPC:
1008 case CCPOPT_GFZA:
1009 case CCPOPT_V42BIS:
1010 case CCPOPT_BSDCOMP:
1011 case CCPOPT_LZSDCP:
1012 case CCPOPT_MVRCA:
1013 case CCPOPT_DEC:
1014 case CCPOPT_DEFLATE:
1015 case CCPOPT_RESV:
1016 break;
1017
1018 default:
1019 printf(", unknown-%d", opt);
1020 break;
1021 }
1022 #endif
1023 return len;
1024
1025 trunc:
1026 printf("[|ccp]");
1027 return 0;
1028 }
1029
1030 /* BACP config options */
1031 static int
1032 print_bacp_config_options(const u_char *p, int length)
1033 {
1034 int len, opt;
1035
1036 if (length < 2)
1037 return 0;
1038 TCHECK2(*p, 2);
1039 len = p[1];
1040 opt = p[0];
1041 if (length < len)
1042 return 0;
1043 if (opt == BACPOPT_FPEER) {
1044 TCHECK2(*(p + 2), 4);
1045 printf(", Favored-Peer");
1046 printf(", Magic-Num 0x%08x", EXTRACT_32BITS(p + 2));
1047 } else {
1048 printf(", unknown-option-%d", opt);
1049 }
1050 return len;
1051
1052 trunc:
1053 printf("[|bacp]");
1054 return 0;
1055 }
1056
1057
1058 static void
1059 ppp_hdlc(const u_char *p, int length)
1060 {
1061 u_char *b, *s, *t, c;
1062 int i, proto;
1063 const void *se;
1064
1065 b = (u_int8_t *)malloc(length);
1066 if (b == NULL)
1067 return;
1068
1069 /*
1070 * Unescape all the data into a temporary, private, buffer.
1071 * Do this so that we dont overwrite the original packet
1072 * contents.
1073 */
1074 for (s = (u_char *)p, t = b, i = length; i > 0; i--) {
1075 c = *s++;
1076 if (c == 0x7d) {
1077 if (i > 1) {
1078 i--;
1079 c = *s++ ^ 0x20;
1080 } else
1081 continue;
1082 }
1083 *t++ = c;
1084 }
1085
1086 se = snapend;
1087 snapend = t;
1088
1089 /* now lets guess about the payload codepoint format */
1090 proto = *b; /* start with a one-octet codepoint guess */
1091
1092 switch (proto) {
1093 case PPP_IP:
1094 ip_print(b+1, t - b - 1);
1095 goto cleanup;
1096 #ifdef INET6
1097 case PPP_IPV6:
1098 ip6_print(b+1, t - b - 1);
1099 goto cleanup;
1100 #endif
1101 default: /* no luck - try next guess */
1102 break;
1103 }
1104
1105 proto = EXTRACT_16BITS(b); /* next guess - load two octets */
1106
1107 switch (proto) {
1108 case 0xff03: /* looks like a PPP frame */
1109 proto = EXTRACT_16BITS(b+2); /* load the PPP proto-id */
1110 handle_ppp(proto, b+4, t - b - 4);
1111 break;
1112 default: /* last guess - proto must be a PPP proto-id */
1113 handle_ppp(proto, b+2, t - b - 2);
1114 break;
1115 }
1116
1117 cleanup:
1118 snapend = se;
1119 free(b);
1120 return;
1121 }
1122
1123
1124 /* PPP */
1125 static void
1126 handle_ppp(u_int proto, const u_char *p, int length)
1127 {
1128 if ((proto & 0xff00) == 0x7e00) {/* is this an escape code ? */
1129 ppp_hdlc(p-1, length);
1130 return;
1131 }
1132
1133 switch (proto) {
1134 case PPP_LCP:
1135 case PPP_IPCP:
1136 case PPP_OSICP:
1137 case PPP_MPLSCP:
1138 case PPP_IPV6CP:
1139 case PPP_CCP:
1140 case PPP_BACP:
1141 handle_ctrl_proto(proto, p, length);
1142 break;
1143 case PPP_CHAP:
1144 handle_chap(p, length);
1145 break;
1146 case PPP_PAP:
1147 handle_pap(p, length);
1148 break;
1149 case PPP_BAP: /* XXX: not yet completed */
1150 handle_bap(p, length);
1151 break;
1152 case ETHERTYPE_IP: /*XXX*/
1153 case PPP_VJNC:
1154 case PPP_IP:
1155 ip_print(p, length);
1156 break;
1157 #ifdef INET6
1158 case ETHERTYPE_IPV6: /*XXX*/
1159 case PPP_IPV6:
1160 ip6_print(p, length);
1161 break;
1162 #endif
1163 case ETHERTYPE_IPX: /*XXX*/
1164 case PPP_IPX:
1165 ipx_print(p, length);
1166 break;
1167 case PPP_OSI:
1168 isoclns_print(p, length, length);
1169 break;
1170 case PPP_MPLS_UCAST:
1171 case PPP_MPLS_MCAST:
1172 mpls_print(p, length);
1173 break;
1174 case PPP_COMP:
1175 printf("compressed PPP data");
1176 break;
1177 default:
1178 printf("%s ", tok2str(ppptype2str, "unknown PPP protocol (0x%04x)", proto));
1179 print_unknown_data(p,"\n\t",length);
1180 break;
1181 }
1182 }
1183
1184 /* Standard PPP printer */
1185 u_int
1186 ppp_print(register const u_char *p, u_int length)
1187 {
1188 u_int proto;
1189 u_int olen = length; /* _o_riginal length */
1190 u_int hdr_len = 0;
1191
1192 /*
1193 * Here, we assume that p points to the Address and Control
1194 * field (if they present).
1195 */
1196 if (length < 2)
1197 goto trunc;
1198 TCHECK2(*p, 2);
1199 if (*p == PPP_ADDRESS && *(p + 1) == PPP_CONTROL) {
1200 p += 2; /* ACFC not used */
1201 length -= 2;
1202 hdr_len += 2;
1203 }
1204
1205 if (length < 2)
1206 goto trunc;
1207 TCHECK(*p);
1208 if (*p % 2) {
1209 proto = *p; /* PFC is used */
1210 p++;
1211 length--;
1212 hdr_len++;
1213 } else {
1214 TCHECK2(*p, 2);
1215 proto = EXTRACT_16BITS(p);
1216 p += 2;
1217 length -= 2;
1218 hdr_len += 2;
1219 }
1220
1221 if (eflag)
1222 printf("%s (0x%04x), length %u: ",
1223 tok2str(ppptype2str, "unknown", proto),
1224 proto,
1225 olen);
1226
1227 handle_ppp(proto, p, length);
1228 return (hdr_len);
1229 trunc:
1230 printf("[|ppp]");
1231 return (0);
1232 }
1233
1234
1235 /* PPP I/F printer */
1236 u_int
1237 ppp_if_print(const struct pcap_pkthdr *h, register const u_char *p)
1238 {
1239 register u_int length = h->len;
1240 register u_int caplen = h->caplen;
1241
1242 if (caplen < PPP_HDRLEN) {
1243 printf("[|ppp]");
1244 return (caplen);
1245 }
1246
1247 #if 0
1248 /*
1249 * XXX: seems to assume that there are 2 octets prepended to an
1250 * actual PPP frame. The 1st octet looks like Input/Output flag
1251 * while 2nd octet is unknown, at least to me
1252 * (mshindo@mshindo.net).
1253 *
1254 * That was what the original tcpdump code did.
1255 *
1256 * FreeBSD's "if_ppp.c" *does* set the first octet to 1 for outbound
1257 * packets and 0 for inbound packets - but only if the
1258 * protocol field has the 0x8000 bit set (i.e., it's a network
1259 * control protocol); it does so before running the packet through
1260 * "bpf_filter" to see if it should be discarded, and to see
1261 * if we should update the time we sent the most recent packet...
1262 *
1263 * ...but it puts the original address field back after doing
1264 * so.
1265 *
1266 * NetBSD's "if_ppp.c" doesn't set the first octet in that fashion.
1267 *
1268 * I don't know if any PPP implementation handed up to a BPF
1269 * device packets with the first octet being 1 for outbound and
1270 * 0 for inbound packets, so I (guy@alum.mit.edu) don't know
1271 * whether that ever needs to be checked or not.
1272 *
1273 * Note that NetBSD has a DLT_PPP_SERIAL, which it uses for PPP,
1274 * and its tcpdump appears to assume that the frame always
1275 * begins with an address field and a control field, and that
1276 * the address field might be 0x0f or 0x8f, for Cisco
1277 * point-to-point with HDLC framing as per section 4.3.1 of RFC
1278 * 1547, as well as 0xff, for PPP in HDLC-like framing as per
1279 * RFC 1662.
1280 *
1281 * (Is the Cisco framing in question what DLT_C_HDLC, in
1282 * BSD/OS, is?)
1283 */
1284 if (eflag)
1285 printf("%c %4d %02x ", p[0] ? 'O' : 'I', length, p[1]);
1286 #endif
1287
1288 ppp_print(p, length);
1289
1290 return (0);
1291 }
1292
1293 /*
1294 * PPP I/F printer to use if we know that RFC 1662-style PPP in HDLC-like
1295 * framing, or Cisco PPP with HDLC framing as per section 4.3.1 of RFC 1547,
1296 * is being used (i.e., we don't check for PPP_ADDRESS and PPP_CONTROL,
1297 * discard them *if* those are the first two octets, and parse the remaining
1298 * packet as a PPP packet, as "ppp_print()" does).
1299 *
1300 * This handles, for example, DLT_PPP_SERIAL in NetBSD.
1301 */
1302 u_int
1303 ppp_hdlc_if_print(const struct pcap_pkthdr *h, register const u_char *p)
1304 {
1305 register u_int length = h->len;
1306 register u_int caplen = h->caplen;
1307 u_int proto;
1308 u_int hdrlen = 0;
1309
1310 if (caplen < 2) {
1311 printf("[|ppp]");
1312 return (caplen);
1313 }
1314
1315 switch (p[0]) {
1316
1317 case PPP_ADDRESS:
1318 if (caplen < 4) {
1319 printf("[|ppp]");
1320 return (caplen);
1321 }
1322
1323 if (eflag)
1324 printf("%02x %02x %d ", p[0], p[1], length);
1325 p += 2;
1326 length -= 2;
1327 hdrlen += 2;
1328
1329 proto = EXTRACT_16BITS(p);
1330 p += 2;
1331 length -= 2;
1332 hdrlen += 2;
1333 printf("%s: ", tok2str(ppptype2str, "unknown PPP protocol (0x%04x)", proto));
1334
1335 handle_ppp(proto, p, length);
1336 break;
1337
1338 case CHDLC_UNICAST:
1339 case CHDLC_BCAST:
1340 return (chdlc_if_print(h, p));
1341
1342 default:
1343 if (eflag)
1344 printf("%02x %02x %d ", p[0], p[1], length);
1345 p += 2;
1346 length -= 2;
1347 hdrlen += 2;
1348
1349 /*
1350 * XXX - NetBSD's "ppp_netbsd_serial_if_print()" treats
1351 * the next two octets as an Ethernet type; does that
1352 * ever happen?
1353 */
1354 printf("unknown addr %02x; ctrl %02x", p[0], p[1]);
1355 break;
1356 }
1357
1358 return (hdrlen);
1359 }
1360
1361 #define PPP_BSDI_HDRLEN 24
1362
1363 /* BSD/OS specific PPP printer */
1364 u_int
1365 ppp_bsdos_if_print(const struct pcap_pkthdr *h _U_, register const u_char *p _U_)
1366 {
1367 register int hdrlength;
1368 #ifdef __bsdi__
1369 register u_int length = h->len;
1370 register u_int caplen = h->caplen;
1371 u_int16_t ptype;
1372 const u_char *q;
1373 int i;
1374
1375 if (caplen < PPP_BSDI_HDRLEN) {
1376 printf("[|ppp]");
1377 return (caplen)
1378 }
1379
1380 hdrlength = 0;
1381
1382 #if 0
1383 if (p[0] == PPP_ADDRESS && p[1] == PPP_CONTROL) {
1384 if (eflag)
1385 printf("%02x %02x ", p[0], p[1]);
1386 p += 2;
1387 hdrlength = 2;
1388 }
1389
1390 if (eflag)
1391 printf("%d ", length);
1392 /* Retrieve the protocol type */
1393 if (*p & 01) {
1394 /* Compressed protocol field */
1395 ptype = *p;
1396 if (eflag)
1397 printf("%02x ", ptype);
1398 p++;
1399 hdrlength += 1;
1400 } else {
1401 /* Un-compressed protocol field */
1402 ptype = ntohs(*(u_int16_t *)p);
1403 if (eflag)
1404 printf("%04x ", ptype);
1405 p += 2;
1406 hdrlength += 2;
1407 }
1408 #else
1409 ptype = 0; /*XXX*/
1410 if (eflag)
1411 printf("%c ", p[SLC_DIR] ? 'O' : 'I');
1412 if (p[SLC_LLHL]) {
1413 /* link level header */
1414 struct ppp_header *ph;
1415
1416 q = p + SLC_BPFHDRLEN;
1417 ph = (struct ppp_header *)q;
1418 if (ph->phdr_addr == PPP_ADDRESS
1419 && ph->phdr_ctl == PPP_CONTROL) {
1420 if (eflag)
1421 printf("%02x %02x ", q[0], q[1]);
1422 ptype = ntohs(ph->phdr_type);
1423 if (eflag && (ptype == PPP_VJC || ptype == PPP_VJNC)) {
1424 printf("%s ", tok2str(ppptype2str,
1425 "proto-#%d", ptype));
1426 }
1427 } else {
1428 if (eflag) {
1429 printf("LLH=[");
1430 for (i = 0; i < p[SLC_LLHL]; i++)
1431 printf("%02x", q[i]);
1432 printf("] ");
1433 }
1434 }
1435 }
1436 if (eflag)
1437 printf("%d ", length);
1438 if (p[SLC_CHL]) {
1439 q = p + SLC_BPFHDRLEN + p[SLC_LLHL];
1440
1441 switch (ptype) {
1442 case PPP_VJC:
1443 ptype = vjc_print(q, ptype);
1444 hdrlength = PPP_BSDI_HDRLEN;
1445 p += hdrlength;
1446 switch (ptype) {
1447 case PPP_IP:
1448 ip_print(p, length);
1449 break;
1450 #ifdef INET6
1451 case PPP_IPV6:
1452 ip6_print(p, length);
1453 break;
1454 #endif
1455 case PPP_MPLS_UCAST:
1456 case PPP_MPLS_MCAST:
1457 mpls_print(p, length);
1458 break;
1459 }
1460 goto printx;
1461 case PPP_VJNC:
1462 ptype = vjc_print(q, ptype);
1463 hdrlength = PPP_BSDI_HDRLEN;
1464 p += hdrlength;
1465 switch (ptype) {
1466 case PPP_IP:
1467 ip_print(p, length);
1468 break;
1469 #ifdef INET6
1470 case PPP_IPV6:
1471 ip6_print(p, length);
1472 break;
1473 #endif
1474 case PPP_MPLS_UCAST:
1475 case PPP_MPLS_MCAST:
1476 mpls_print(p, length);
1477 break;
1478 }
1479 goto printx;
1480 default:
1481 if (eflag) {
1482 printf("CH=[");
1483 for (i = 0; i < p[SLC_LLHL]; i++)
1484 printf("%02x", q[i]);
1485 printf("] ");
1486 }
1487 break;
1488 }
1489 }
1490
1491 hdrlength = PPP_BSDI_HDRLEN;
1492 #endif
1493
1494 length -= hdrlength;
1495 p += hdrlength;
1496
1497 switch (ptype) {
1498 case PPP_IP:
1499 ip_print(p, length);
1500 break;
1501 #ifdef INET6
1502 case PPP_IPV6:
1503 ip6_print(p, length);
1504 break;
1505 #endif
1506 case PPP_MPLS_UCAST:
1507 case PPP_MPLS_MCAST:
1508 mpls_print(p, length);
1509 break;
1510 default:
1511 printf("%s ", tok2str(ppptype2str, "unknown PPP protocol (0x%04x)", ptype));
1512 }
1513
1514 printx:
1515 #else /* __bsdi */
1516 hdrlength = 0;
1517 #endif /* __bsdi__ */
1518 return (hdrlength);
1519 }
[mirror] the TCPdump network dissector